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Process Control And Instrumentation MCQs: 88 Questions & Answers in Engineering

88 Process Control And Instrumentation MCQs in Engineering with answers & explanations. Page 4. Practice objective questions for competitive exams, interview… Use the answer toggle below to show or hide all solutions, tap an option to check one question, or open a question for its own page.

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Process Control And Instrumentation MCQs: 88 Questions & Answers in Engineering

The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is

Which of the following controllers has the least maximum deviation?

__________ controller has the maximum stabilising time.

A bolometer is

A magnetic flowmeter is

Which of the following is not a speed measuring instrument?

A stable system is the one

Radiation thermometer can not measure the temperature

Which of the following is the dynamic characteristics of an instrument?

High temperature of around 2000°C of incandescent gas mantles is measured by a/an

Liquid flow rate in a small channel is best measured by a/an

Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?

Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.

A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

Thermal conductivity measurement is used for the determination of

Bode diagram are generated from output response of the system subjected to which of the following input?

Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Temperature measuring instruments are standardised mostly with __________ points of pure substances.

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